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2006). Dominant taxa were cheatgrass, shadscale, and rubber rabbitbrush with 25.1%, 3.4%, and <br />2.3% average cover, respectively. <br />This unit fails the revegetation success criterion of 90% of the Shadscale Reference Area value when <br />both annual and perennial cover values are combined. However, it passes when only perennial cover is <br />compared (Table 1). <br />The Roadside Refuse Borrow Area currently passes two of the four diversity standards. There is <br />sufficient cover of perennial forbs or sub-shrubs to pass the required minimum values, and there are no <br />planted species with greater than 70% relative cover. However, the present relative cover of perennial, <br />warm-season grasses (0.3%) and perennial, cool-season grasses (0.0%) are insufficient to pass the <br />required minimum value (2.0% and 0.5%, respectively). <br />Qualitative analysis indicates that the Roadside Refuse Borrow area is in average condition overall. <br />This area displayed good shrub density. The noxious species Russian knapweed (AcropMon repens) was <br />observed within this unit. <br />3.11 Roadside Refuse Disposal <br />Ground cover of the Roadside RDA consisted of 56.8% live vegetation, 1.9% rock, 20.6% litter, and <br />bare soil exposure of 20.7% (Table 3b). Perennial cover across the unit averaged 27.7% (down from <br />29.5% in 2006) with annual and biennial cover averaging 29.1% (up from 28.1% in 2006). Dominant <br />taxa were cheatgrass and forage kochia with 29.1% and 23.8% average cover, respectively. <br />This unit passes the revegetation success criterion of 90% of the Shadscale Reference Area value <br />when both annual and perennial cover values are combined. It also passes when only perennial cover is <br />compared (Table 1). <br />The Roadside RDA currently passes two of the four diversity standards. There is sufficient cover of <br />perennial forbs or sub-shrubs, and there are no planted species with greater than 70% relative cover. <br />However, the present relative cover of perennial, warm-season grasses (0%) and perennial, cool-season <br />grasses (0.2%) are insufficient to pass the required minimum value (2.0% and 0.5%, respectively). <br />Qualitative analysis indicates the Roadside Refuse Disposal revegetation is in average condition <br />overall. Diversity of grasses and forbs is low; however, the shrub population displays good diversity. As <br />with other units, the Roadside Refuse Disposal exhibits an abundance of cheatgrass throughout the <br />reclaimed area. <br />CEDAR CREEK ASSOCIATES, Inc. Page 22 Snowcap Coal Co. - 2008 <br />Revegetaton Evaluation